Adding a domain causes disabling others in vhosts file

[vprocopan]

As described in the Subject, when I add a domain, or make changes to domains (or subdomain), it causes disabling many domains in vhosts file, the issue is caused by manual editing of vhosts for adding SSL for one of the site (as described by the previous Systems Administrator), now i have to setup this as it is suposed to be, by web interface I guess, i also have the thread in Zpanel support forum, but it isn't working anymore, please help me troubleshoot this issue.